class Privileges():
    def __init__(self):
        self.privileges = ['can add post', 'can delete post', 'can ban user']
    def show_privileges(self):
        print(self.privileges)

class User():
    def __init__(self,first_name,last_name):
        self.first_name = first_name
        self.last_name = last_name
        self.login_attempts = 0
    def describe_user(self):
        print("user information: "+self.last_name+" "+self.first_name)
    def greet_uesr(self):
        print("hello "+self.last_name+" "+self.first_name)
    def increment_login_attempts(self,attempts):
        self.login_attempts += attempts
    def reset_login_attempts(self):
        self.login_attempts = 0

class Admin(User):
    def __init__(self, first_name, last_name):
        super().__init__(first_name,last_name)
        self.privileges = Privileges()